Can Engine Coolant Be Replaced with Mineral Water?

1 Answers
MacBrianna
07/30/25 9:48am
In emergency situations where antifreeze is unavailable, purified water or mineral water can be added, but tap water should be avoided if possible. Here are the relevant details: 1. Hazards: Mineral water not only increases the freezing point of the coolant but also causes chemical reactions between its minerals and the components of the coolant, affecting functions such as anti-boiling, anti-corrosion, anti-scaling, and lubrication of the cooling system. 2. Post-addition Handling: It is recommended to replace the coolant entirely. If the coolant level is sufficient but gradually decreases during use, and this is not due to leakage, there is no need for concern. You can directly add purified or distilled water to the coolant, but tap water or river water must never be used.
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